... (Manometer) with Stainless Steel Bezel and Stainless Steel Roll Ring Liquid Filled GaugeCase sizes: 1.5, 2, 2.5, 3, 4 ... Tube and socket: phosphor bronze and brass Movement: brass Liquid: glycerin or silicone oil Connection: 1/8, 1/4, 3/8, 1 ... % accuracy, U-Clamp, restrictors, special connections and more Stainless steel liquid Filled Gauge